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Jetta Operating Co., a 24-year-old privately held oil and gas company in Fort Worth, and a related entity plan a 26-story mixed-use tower downtown at Taylor and Fifth streets on a site once owned by the Star-Telegram.

Six candidates have filed for the two open seats on the Tarrant Regional Water Board, setting up a battle that could potentially shift the balance of power on the board and the priorities of one of the largest water districts in Texas.

NEW YORK (CNNMoney) -- No patient wants to experience complications after surgery. But such complications can actually lead to higher profits for hospitals if the patients are covered by Medicare or private insurance, according to a report released Tuesday by the Boston Consulting Group.

When a privately insured patient experiences one or more complications -- such as blood clots, stroke, infection, septic shock, pneumonia or cardiac arrest -- hospitals' profit margins are 330% higher compared to a patient with no complications, the report found.

For Medicare patients with complications, hospitals' profit margins are 190% higher, according to the report, which was published in The Journal of the American Medical Association.

The report isn't suggesting that complications are caused intentionally, said Dr. Barry Rosenberg, a co-author of the study. But he hopes the findings provoke discussion on the "absolute need for payment reform," he said.

Hospitals make more money the longer a privately insured or Medicare patient stays, said Rosenberg, a partner with BCG's health care practice. As a result, they may lack financial incentives to take steps to reduce surgical complications, he said.

"Insurers are rewarding hospitals when there are complications," he said. "This is not the type of incentive you want ... in the healthcare system for your family."

The BCG study analyzed insurance billing data for more than 34,000 in-patient surgeries performed in 2010 across a 12-hospital system in the southern United States. Of those surgeries, 5.3% -- or 1,820 patients -- experienced one or more complications.

Hospitals receive $56,000 in working revenues on average when a privately insured patient has a complication, but only $17,000 when they're complication-free, according to the report. They receive $3,600 when Medicare patients have a complication, vs. $1,800 when they're free of complications.

"It's been known that hospitals are not rewarded for quality, but it hadn't been recognized exactly how much more money they make when harm is done," said Dr. Atul Gawande, a professor at Harvard School of Public Health and co-author of the study, in the report. "Hospitals should financially gain, not lose, by reducing harm."

It's a different story for so-called "safety net" hospitals that primarily treat patients covered by Medicaid or who pay for their own health care. In those cases, hospitals actually make less if complications ensue because of the way Medicaid and consumers pay, according to the report.

Texas Health Resources and Ariadne Labs, a joint research center at Harvard School of Public Health and Brigham and Women's Hospital, partnered with BCG on the study.

The American Hospital Association was not immediately available for comment on the study.